@addTagHelper *, TagHelpers

<html>
    <head>
        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
    </head>
    <body>
        <alert type="Danger">
            Hello World Danger Style
        </alert>
    </body>
</html>